Questions & Answers about Prendi il cavo nero e inseriscilo qui.
Why is the word lo attached to the end of inserisci?
What exactly does the lo in inseriscilo refer to?
Why does the command form of inserire have -isc- in it?
Inserire (to insert) is one of those -ire verbs that needs the extra letters -isc- in its present tense forms, just like capire (to understand) or finire (to finish). For regular -ire verbs, the informal command is exactly the same as the present tense tu form, which is why it becomes inserisci.
Is prendi a command or just the present tense 'you take'?